Horace craighead



(No Model.)

H. GRAIGHBAD. CENTRAL DRAFT LAMP.

2 9 oo 1 f 2 mm W a I M J y M M h F C W H F0 M LL 2 0 \r, k W t n 3 a: 3W .L a e h a #2.. h an I... t ii 0 l h i Z P n w ll 2 W am: Mm e 4 u m o000 m u 0 Z z n j IMO... E h a ll bill!" I lldl D .Z n. ,H .x a m A QW-vbneooeo.

my MZM UNITED STATES PATENT FFICE.

HORACE CRAIGHEAD, OF BALLARD VALE, MASSACHUSETTS, ASSIGNOR TO THECRAIGHEAD & KINTZ COMPANY, OF SAME PLACE.

CENTRAL-DRAFT LAM P.

SPECIFICATION forming part of Letters Patent No. 471,507, dated March22, 1892. Application filed April 9, 1891. Serial No. 388,210. (Nomodel.)

To all whom it may concern.-

Be it known that I, HORACE CRAIGHEAD, of Ballard Vale, Essex county, andState of Massachusetts, have invented a certain new and usefulImprovement in Central-Draft Lamps, of which the following is aspecification.

My improvement relates to central-draft lamps; and the object of theimprovement is to facilitate the lighting of such lamps.

I will describe a lamp embodying myimprovement, and then point out thenovel fea tures in a claim. I

In the accompanying drawings, Figure 1 is a sectional elevation of theupper part of a lamp embodying my improvement in condition for use. Fig.2 is a similar View showing the burner part of the lamp in condition forlighting. Fig. 3 is a central vertical section of the wick-tube and theinnerair-distributer.

Similar letters and numerals of reference designate corresponding partsin all the figures.

A designates the upper part of an oil reservoir or fount, which may beof ordinary form and made of sheet metal.

B B designate the wick-tube of the lamp. This wick-tube is composed oftwo cylindric and concentrically-arranged shells B B The shell B extendsupwardly through a central.

opening or collar a, with which the reservoir or fount is provided, andis intended to extend in the usual manner down through the bottom of thereservoir, so as to form a central draft-tube. The outer shell B is hereshown as attached to an outer air-distributer C, which is detachablyfitted to the collar a of the reservoir A. This air-distributer C may befastened to the collar a by means of a bayonet-joint a or any otherdevice, or may be simply held in place by friction. This shell B when inplace extends upwardly to a point on a level with the tip of the shell Bof the wick-tube.

D designates a tubular wick, which fills the space between the shells BB As here shown, it is fitted to a carrier E, consisting of a band ofsheet metal. It may be engaged with the carrier or band E by means ofprongs on the latter or in any other suitable manner. The carrier ofcourse slides between the two shells of the wick-tube. It is adjusted upand down by means of a ratchet-wheel F, mounted upon a shaft journaledin the air-distributer C and engaging Wit-h perforations formed in thecarrier or band.

G designates the inner air-distributer,which consists of two conicalshells g 9 arranged one above the other and connected with a tubularpart 9 which is surmounted with a hollow head g which is perforatedaround the circumference. Air ascending through the central draft-tube Bpasses through the lower vconical shell g into the space between theshell B and the part and afterward passes through the upper conicalshell 9 and is discharged at the base of the flame. Air also passes fromthe shell B into the part g and is discharged through the perforationsof the head g into the flame. This air-distributer G is, as here shown,supported by having its lower conical shell 9' resting upon a bead orinward projection 1), formed on the shell B;

H designates an air-distributor arranged above the air-distributer C andconsisting of two shells h 7?. portion constructed to form achimney-gallery having resilient fingers h. At its inner edge it has anupwardly-turned rim or collar h The shell h extends inwardly and at theinner edge is almost as small as the shell B of the wick-tube. Thisshell h is perforated almost throughout its entire extent. Its outerextremity is made in the form of a downwardly-extending rim h, whichfits a corresponding rim 7L formed on the shell W. The shell h may beretained in the shell 71. by means of a bayonet-lock or in any other desired manner. It is advantageous to make it detachable to facilitatecleaning. Air entering the air-distributer C will rise to theairdistributer H, and, after passing through the perforations of the twoshells h k of the latter, will enter the space within the chimney andpass to the outside of the flame. Neither shell of the air-distributer His intended to contact with the air-distributor C. It is advantageous toleave a space between these two air-distributors H and C for thecirculation of air. By this means the air-distributor C may be keptcool. As the air-distributer H does. not contact witht-heair-distributer C, it must be supported by some other part. I haveshown it attached to a cylindric shell I, surrounding and snugly fittingthe outer shell 13 of the wick-tube. The rim or collar at the inner edgeof the shell 77, of the air-distributer H is fastened in any suitablemanner to the shell I. The shell I is shown as provided with slots 2',having an ascending portion 1 and a horizontal portion 2, extending fromthelower end of the ascending portion 1. The ascending portion 1 of eachslot is shown as oblique or spiral. With these slots engage projections19 extending outwardly from the outer shell B of the-wick-tube.Obviously by rotating the shell I by force applied to the airdistributerH through a handle h or otherwise the shell I will be caused to travelupwardly along the outer shell B of the wicktube, and after the shell Ishall have traveled the whole length of the slots 2' the horizontalportions 2 at the lower ends of the said slots will engage with theprojections b and the shell I will thereby be sustained in an elevatedposition. The shell I has an opening I through it below thechimney-gallery, which when the shell is in its upward or raisedposition affords access to the wick. The very firm bearing which theshell I will have upon the outer shell B of the wick-tube prevents anycanting or tilting of the air-distributer H. Consequently the chimneyand a shade, as well as all other parts supported by the airdistributerH, will not be liable to injury. Preferably there will be grooves t" atthe lower end of the slots '5. These grooves may be made by bending theshell I outward.

They are intended to be deep enough to pass over the projections Z9 Thusthey will render it possible to remove the shell I. Thus constructed theshell I and of course all parts sustained by it will be detachablyconnected to the other parts of the lamp. When the shell I is rotatedinto such position that the upper ends of its slots twill contact withthe projections 12 the latter will sustain the shell I and itsappurtenances.

It will be seen that I afford provision for raising the chimney-galleryand upper airdistributer II, with their appurtenances, in such mannerthat it will be possible to light the lamp without removing the chimneyor shade.

What I claim as my invention, and desire to secure by Letters Patent,is-

In a central-draft lamp, the combination, with the reservoir or fountand wick-tube, of a chimney-gallery and a shell connected with thechimney-gallery and closely fitting the outer shell of the wick-tube andprovided with slots engaging projections on the wicktube and consistingof obliquely-ascending and horizontal portions, and alsoprovided withgrooves extending from the slots downwardly to and having an outwardopening at the lower edge of the shell, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

. HORACE ORAIGI-IEAD.

Witnesses: JAMES .S. GREvEs, WILLIAM M. ILIFF.

